Automatically operated wind responsive window ventilator



Nov. 14, 1961 AUTOMATICALLY OPERATED WIND RESPONSIVE WINDOW VENTILATOR Filed April 7, 1958 L. A. VAN DE VEIRE 4 Sheets-Sheet 1 INVENTOR.

150A; V/i/Vfif VL /e5 naw EY f Nov. 14, 1961 L. A. VAN DE VEIRE 3,003,403

AUTOMATICALLY OPERATED WIND RESPQNSIVE WINDOW VENTILATOR 4 Sheets-Sheet 2 Filed April 7, 1958 INVENTOR. .450 A. mvfii VE/E' 1961 A. VAN DE VEIRE 3,008,403

AUTOMATICALLY OPERATED WIND RESPONSIVE wnwow VENTILATOR Filed April 7, 1958 4 Sheets-Sheet 5 IN VEN TOR. ZEO/V /Z Mwvfie 5485 W ORN I Nov. 14, 1961 A. VAN DE VEIRE 3,008,403

AUTOMATICALLY OPERATED WIND RESPONSIVE WINDOW VENTILATOR Filed April-7, 1958 4 Sheets-Sheet 4 AT ORNEY 1 United States Patent 3,008,403 AUTOMATICALLY OPERATED WIND RESPON- SIVE WINDOW VENTILATOR Leon Albert Van De Veire, 26347 Edison Road,

South Bend, Ind. Filed Apr. 7, 1958, Ser. No. 726,906

12 Claims. (CI. 98-95) and more particularly to a ventilator of the jalousie type.

The primary object of this invention is to provide a ventilator of this character which is of simple construction, which is easily installed in and removed from a window, which may be set in any selected position and will retain this position.

A further object is to provide a device of this character having means responsive to wind pressure for closing the same and having means for restoring the construction to open position after wind pressure subsides."

Other objects will be apparent from the following specification. I

In the drawings: r I

FIG. 1 is a face vew of the device installed in a window;

FIG. 2 an enlarged vertical sectional view taken, on line 2-2 of l;

FIG. 3 is afragmentary enlarged transverse sectional view'taken on line 33 of.FIG. 2; g

FIG. 4 is a vertical sectional viewtaken on line,4-'-4 of FIGS; I FIG. 5 is a rea'r vertical 55' of FIG. 6; 1 Q.

FIG;6, is a vertical sectional view taken on line I of FIG. -5; 7 i

FIG. 7 is an enlarged fragmentary detail sectional viewtaken on line 44 of FIG. 5;

FIG. 8 is a view of a springas viewed from the top in FIG. 10 is an enlarged fragmentary detail sectional sectional view taken on line "ice embodiments of the invention; the numeral 25 designates the frame for a double-hung window having an upper sash member 26 and a lower sash member 27 slidable vertically in lateral guides provided by stops 28 of the frame which also. includes the sill portion 29. A window screen unit 30 may be mounted in the window frame bearing upon the sill 29 and located outwardly of the outer stop 28 shown at the right in FIG. 3.

7 As best seen in FIG. 3, a pair of opposed upright members are carried by the window frame.

Each upright member is preferably a channel including a base portion 3'2,side portions 33, and inwardly offset leg portions 34. The channels are mounted at each side of the frame with the leg portions 34 thereof positioned between the stops 28 which guide the lower sash 27. The channels and associated parts to be described are held in place by a locking unit of .the character illustrated in FIG. 19 and including a longitudinal web 35 hearing flat against one side 33 of the channel and a flange 36 interposed between the innermost stop 28 and an offset in one leg of the channel 34. At its upper end the stop has a transversely extending U-shaped part 37 adapted to receive the lower'portion of the lower sash 27 when elevated. The lower portion of the locking member 35 has an offset flange 38 adapted to bear against the inner trim member 39 at the bottom inner side of the window sash. A stick or strut 40, FIG. 1, positioned between the upper edge of the elevated lower sash 27 and the topof the window frame 25 holds the sash 27 in firm engagement with the parts 37 of the locking units 35. Each of the channel bases 32 has pivoted therein a plurality of pivot pins 42 in longitudinal alignment and equallyspaced relation.

The pivot pins are so arranged that the pins of opposite channels will be axially aligned. Each pin mounts a vertically elongated channel or socket 43 closed .atits bottom at 44 and serving to receive one end of a glass pane or louver member 45 which spans the space beview taken on line 5'5' of FIG. 6, and illustrating the same parts shown in FIG. 9; a a FIG. 11 is an enlarged fragmentary detail sectional view taken on line' 44 of FIG. 5, and illustrating an other detail of-the construction, with-the parts thereof:

Shown in one position; p v

' FIG. 12 is a-detail sectional view taken on line 4-4 nine different operative position;

of FIG. Sand illustrating-the same parts shown FIG. 13*is. an enlarged fragmentarydetail sectional view taken on line 13-'-'13 of FIG. 6;.

FIG. 14 is a schematic View illustrating the parts of the device in closed position;

FIG. 15 is a schematic view illustrating .the parts'of the device in fully open position; f '1 FIG. vl6 is a schematic view.-illustrating the parts in open position, with one part thereof shifted tocondition the device for automatic operation;

FIG. 17 is a schematic view illustrating the positionof tween adjacent channels 32. The channels and panes are confined in operative position by flanges 35 of the locking unit. s

The socket. members 43 are pivoted at or slightly above the center thereof, and the lowest socket is pivoted from the bottom of each channel a distance equal to the spacing between the lower edge of the socket and the pivot so that the bottom edge of the socket will bear against the sill 29 when in the closed position illustrated in FIG. 2. The spacing between the pivots 42 is less than the vertical dimension of each glass pane 45 so that the panes lap each other in the closed position illustrated in FIG. 2 and lie in parallel planes. If desired, abutment members 46 may be mounted on the channels to be interposed between the'adjacent sockets 43 in .the closed position of the panes, as illustrated in FIG. 2, and such the parts'in fully automatic. position, with the louversopen;

. FIG. 18 is a schematic VieWiII S Y g 'theflrelatiiofilv-titf the parts in schematic view operated towardclosed-position in response to-wind pressure upon the device;

FIG. 19 is a perspective view of ,a locking element used in conjunction'withgthe device; and

modificationxof the device.

Referring to the drawings which illustrate the preferred pivot pin 42, is pivotally connected at 52 to an elongated stop means or spacers may include abutment members 47 projecting inwardly adjacent to the top edge of the adjacent innermost louver to form a stop means preventing withdrawal of the panels 45 from the sockets when the ventilator is in closed position but not interfering with sliding of the panels from the sockets when the panels are in an open position, for example, in the position illustrated in FIG. 6.

In the preferred construction, the channels at their upper ends fixedly mount carriers 48 extending to a level preferably slightly above the level of the uppermost pin 42. The carrier 48 forms means for mounting the ends of a pane 49 above and outwardly of the uppermost full pane 45 for purposes to be described.

Each of the pivot pins 42 fixedly mounts thereon the bulb portion 50 of an arm or link 51. The arms or links 51 as illustrated in FIG. 4, are of equal length and each of the arms, except arm 51a connected to the uppermost lower bar or rod 53 at points on said rod spaced apart the same distance as the spacing between adjacent pivot pins 42. By this arrangement each of the louvers, panels or panes 45, except the uppermost pane in some instances, is connected to and caused to swing equally and simultaneously with the others. The bar 53 of one channel preferably has an offset 54 adjacent its upper end to which is pivoted at 55 a link 56 which in turn is pivoted at 57 to another link or bar 58', extending substantially parallel to and alongside bar 53, all as illustrated in FIG. 4.

A manual latch mechanism or locking device, by means of which the angular position of the panes 45 may be controlled, is provided in the device. As best illustrated in FIGS. 3, 4, 5, 6 and 13, the base 32 of one channel has an elongated longitudinal slot 59 formed therein intermediate its height to accommodate slidably therein a bracket member 60 carried by bar 58, as best seen in FIG. 13. Bracket 60 preferably includes an upwardly extending portion 61 and a substantially horizontally projecting portion or member 62. A bellcrank member is pivoted at 63 to the bracket. One leg 64 of the bellcrank carries a pin or pins 65 at its free end adapted to seat in a selected one of a series of spaced holes or apertures 66 located alongside the slot 59 in the channel base 32. The other leg 67 of the bellcrank is pivoted at 68 to a trigger or actuating member 69 which preferably has a slidable connection with a pin 70 carried by the member 62, which pin is encircled by a coil spring 71 serving normally to press the actuator 69 in a direction to cause the pin 65 of'the bellcrank to seat in an aperture 66 in the channel base. Movement of the actuator 69 from the full line to the dotted line position shown in FIG. 13 withdraws the bellcrank and the pin to permit sliding of the bracket 61? relative to the channel base 32. If desired, means. may be provided to hold the actuator 69. in releasing position, which means may take the form of a hook or other retainer '72 carried by the member 6 2 and engageable in an aperture 73 in the actuator 69, as illustrated in dotted lines. in FIG. 13.

The uppermost pivot pin 4-2 and its associated pivot arm 51a preferab y has pivotally connected thereto at 75 the upper end portion of an elongated bar 76 which has a lost motion connection with lower bar 53, as by means of an elongated longitudinal slot 77 formed therein at its lower end and receiving a pin 7 8 fixedly carried by the upper end of the bar 53. Spring means are provided to'releasably hold the slotted bar 76 in the position illustrated in FIG. 11, with the pin 78 of the bar 53 at the upper end of the slot 77 thereof and with the bars 76 and 53 substantially parallel to one another. Such spring means are here shown as an elongated leaf spring 79 anchored to the slotted bar 76 at 89. above the slot 77and positioned against free swinging movement as by means of a second anchor pin 81 adjacent to the pin 80 and adapted to be straddled by parts of the'spring '79 at opposite ends of a loop thereof extending around the pin 80. The spring 79 has a laterally projecting portion 82 intermediate its ends and so spaced relative to the slot 77 as to lock the pin 78' at the upper end of said slot, as. seen in FIG. 11. The spring terminates in a free laterally offset end portion 83 which preferably extends to a level adjacent and preferably below the lower end of the slot 77.

An elongated latch lever or rod 85 extends lengthwise in each channel 32, 34 and preferably has an ofiset 86 (FIG. 4) formed therein adjacent its lower end at which the same is pivoted by a pivot pin 87 at a point substantially aligned with the pivot pins 42. The offset 86 in the rod or lever permits the rod to extend vertically and substantially parallel to the line between the pivot pins 42 but alongside the same, as best seen in FIG. 4. The lower end portion of the pivoted rod or lever 85 cooperates with rod-latching means. Thus rod 85 has pivotally connected thereto at 88 a latching bellcrank orlatch abutmentmcmber having a depending arm 89 and an 4 upper arm 91 projecting laterally from rod 85 and terminating in a foot portion or shoe 92. The free end of the depending arm 89 is engageable with a stop member or pin 90 carried by the rod 85 to limit pivoting of the bellcrank on the rod 85 in clockwise direction as seen in FIGS. 4 and 9. The foot portion or shoe 92' of the arm 91 is adapted to. bear against an, abutment: on bar 53, such as a protrudi'ng'or abutment portion of: the pivot pin 52 interconnecting the lowermost pivot arm 51 with the lower end" of the bar53', as illustrated in FIGS. 9 and 10. Thus latch rod or lever 85 and latching abutment or bellcrank 89, 91 with the pins 90 and 52' com- 1 prise a second latch which cooperates with the louver interconnecting bar 53 to latch the louver interconnecting' means and the louvers connected thereby in open position independently of the'manual latch mechanism. The latching bellcrank part 9 1 has a plurality of apertures 93, in a selected one of which is anchored one hook end portion of an elongated coil spring 94 whose opposite end has a hookrportion engageable with a selected one of a plurality of longitudinally spaced pins 95 carried by the lower free end portion of the latch rod 85. The arrangement of the spring is such that the pressure which it exerts upon the bellcrank 89, 91 is determined by the selection of the pin 95 at which its lower end' is anchored and of the aperture 93 at. which its upper end is anchored.

The pivotal position of the latch rod or lever 85 is normally steadied by a leafspring or elongated wire spring 98 having one end 99 thereof anchored to a side wall of the channel at 100, as seeninFIG. 4. '1 The springhas an offset portion 101 thereof intermedite its ends, and the free end portion 102 thereof is preferably bent, as best seen in FIG. 8. The bend 102 serves to normally hold the latch rod 85 in vertical position, as illustrated in full lines in FIG. 7, and when the latch rod is. swung to the dotted line position shown in FIGS. 7, 8 and 9; the offset or shoulder 101 of the spring serves to hold it in that pivoted position.

bent at its end and terminates in a. stop 107 engageablewith the latch rod or lever 85 at the side of therrod opposite that adjacent the pivot pin 42 so that the. latch rod 85 is positioned between the pivot pin 42 and the stop 107. A central lateral leg 108 ofthe bracket terminates in a foot portion 109 having a cam edge engageable by a pin 110 carried by'the lower free end of the slotted bar 76. The arrangementis such that, iflthe upper, panel 45' is tilted downwardly fromzan arrangement in which all panels 45 are fully open, as illustratedin FIG. 15, to the position in FIG.'16; the slotted bar 76.is moved bodily upwardly and the pin 110 bears against theend face of the bracket shoe 109 'to tilt the bracket from the position shown in FIG. 11 to that-shown in FIG. 12. The result of the tilting action is that the stop 107 engages the latch rod 85 and swings or trips the rod from the position shown in FIG. 11 to that shown in FIG. 12.

A latch-rod-positioning bellcrank is pivoted on the uppermost pivot pin 42. The bellcrank has a depending bearing against the adjacent side wall 33 of the channel.-

The opposite end 121 of the spring terminatesein a hook which engages in one of a group of apertures 122 formed in thebellcrank arm 117 to adjust the tension applied by the spring to the latch rod 85. 7

One of the pivot pins 42, see FIG. 4, here shown as an intermediate pin, pivotally mounts a bellcrank having an upwardly projecting arm 1.25 engageable with a side wall 33 of the channel. A lateral arm 126 of the bellcrank has a projection 127 engageable with the bottom edge of the adjacent link 51. A spring 128-129 resists movement of the bellcrank 125, 126 in a clockwise direction from the position shown in FIG. 4 and thereby opposes downward movement of bar 53 in a selected range of its movement. This spring may constitute a wire portion coiled around the pivot pin 42 and having an end portion 128 bearing against the channel wall 33. The opposite end 129 of the spring is anchored to the portion 126 of the bellcrank. Spring 128, 129 facilitates automatic closing of the louvers as hereafter described.

Spring means serve to adjustably press the rod 53 in a downward direction and acts in opposition to spring 128, 129. As here seen, said spring means may constitute a wire spring loosely coiled around one of the pivot pins 42 having one end 130 thereof bearing against channel wall 33 above the pin 42 and the opposite end 131 thereof hooked in an aperture of the adjacent-link engage a hole or holes in a set of holes 66. The manual latching mechanism serves to hold the louvers in the selected position, and a wide range of 'positionsmay be provided determined by the number of holes or apertures 66 and the spacing thereof. The upper portions of both FIGS. 4 and 6 illustrate various angular positions which the louvers or panels 45, 45 may assume, and it will be understood that these positions are illustrative only, and it will further be understood that all of the louvers or panels 45 and 45 may assume each of these angular positions in unison. The range of angularity will preferably extend from a fully closed position, as illustrated in FIG. 14, to a fully open position as illustrated in FIG. 15. g

If it is desired to condition the ventilator or jalousie in open position, to be closed, however, in the event wind pressure develops, the following sequence of operations is performed. The panels 45 are first moved to fully open position with the bar 53 in itslowermost position as illustrated in FIG. 15. Then while the remaining panels '45 are. held fully open, the uppermost panel 45 is tilted to the FIG. 16 position. This tilting action of the upper panel 45' is accommodated by release of part 82 of spring 79 from pin 78 on bar 53 and by upward endwise movement of the slotted bar 76 relative to the lower slotted bar 53. As the bar 76 moves upwardly, the pin 110 thereon strikes the canredge of the shoe 109 of the adjacent latch-tripping bracket bellcrank, and tilts that bracket counterclockwise, as viewed in FIG. 12, so that.

bodily toward the bar 53 and intoaposition in which the shoe 92 thereof bears uponor intercepts the stud 52' when the bar 53 has been lowered to its full extent to accommodate full opening position of the louvers, as explained above and as illustrated in FIG; 15. Consequently, 'when the shoe 92 of the latching bellcrank 89, 91locks on the lug 52' and is held by the action of the spring'94, the bar 53 is held in lowered position, as shown in full lines in FIG. 9, and as shown in FIG. 17; This locking action by the latching bellcrank 89, 91 holds the louvers 45 in nearly open position Without. the locking device shown in FIG. 13. Consequently, the locking device shown in FIG. 13 may be rendered inoperative by moving the actuator'69 thereof to the dotted line position shown tion shown in FIGS. 7 and 9. The dottedlineposition' of the latch rod in FIGS. 7 and 9 is attained whenever the louvers assume closed position, either by manual or automatic operation, by the action of the latch-rodpositioning bellcrank 115, 117, best seen in FIG. 7. Also, it may be noted that the spring 79, 83 associated with the elongated slot 77 of slotted bar 76, as seen in FIGS. 11 and 12, allows the louvers 45 and 45' to resume operation in unison and parallel positions upon closing of the louvers again by either manual or automatic operation. As in the arrangement of the rod-latching bellcrank 91, 92 above explained, so also the latch-rod-tripping bracket 106, 109 of FIGSLI]. and 12 is clear of contact with any pins associated withjthe bars 53 or 76, due to the circular arc of travel-of the links 51, until such time as the latch rod 85 is moved to the full'line position in FIG. 12 sothat the pin 110 engages foot 109 of the bracket as said pin moves upward with slotted bar 76 when louver 45 is tilted from its position in FIG. 1 5'to its position in FIG. 16. After the pin 110 passes the foot 109, the lever 106, 108 is free to returnto the FIG. 11 position and thereby conditionit for the next action.

As the upper louver 45' is tilted from the FIG. 15 position to the FIG. 16 position, the latch-rod-positioning bellcrank 115, 117 is pivoted by the movement of the arm or link 5101 from the full line to the dotted line posi tion shown in FIG. 7. As this pivotal movement occurs,; the shoe 116 of the leg of the latch-rod-positioning bellcrank serves to push the latch rod or lever 85 from the full line to the dotted line position in FIG. 7 whenever the wind acting upon the louver 45' tilts the same, as illustrated in FIG. 18.

The bellcrank 125, 126 cooperating with its associated link 51 under the influence of the spring 128, 129 serves as means to assist closing of the louvers in responseto wind pressure. This bellcrank is so associated with link 51 and the channel wall that it is freeto move only between a partly open position and afully open position. Inother words, the leg bears against the sidewall 33 of the channel when the uniti-reaches a partly open position. Movement of the close-assisting bellcrankv 125, 126 from partly open to fully open louver position occurs against the reactance, or resistance of the spring 128, 129 so that the spring isunder substantial tension inthe FIG. 16 open louver position of the parts; stantially relaxed when thelouvers reach the partially open position shown'in-FIGS. 4 andv 18. The principal function-of the bellcranklever125, 126 is to assure C1059 ing movement of the louvers by. wind pressure-and to limit the extent to which the louvers 45 'will reopen after abatement of wind pressure substantially at the position shown in FIGS. 4 and 18. In one construction the limitation upon reopening of the louvers imposed by the closeassisting bellcrank lever 125 is an open position of approximately 30 degrees. However, it will be apparent that the shape and arrangementof the lever will determine this The spring tension is subfactor and that it may vary substantially according to the wishes of the fabricator.

The spring 130 serves asmeans tend-ing to open the louvers for ventilation after the mechanism has been tripped and at such time as the wind pressure which a l causedthe tripping action has abated or reduced. The

spring has several adjustments accommodated by the adjustment openings 132 in arm 51b and these'tting or adjustment of the spring controls or adjusts'the reopening force exerted by the spring 130-. It will be understood that in some instances, depending upon the balance or unbalance of the louvers relative to pivot pins 4 2-, it is not necessary to use a spring 130. Also it will be understood that the close-assisting bellcrank lever 125-, while preferred, is optional and is not required.

To recapitulate the operation of the device in response 120*W1I1d pressure, the manual latch mechanism 6272'- is first actuatedto inoperative position, as seen in dotted; linesin FIG. 13, and is heldin that position by the locking of retainer 72 in aperture 73'of actuating member 69. The louvers 45 are then moved to the FIG. 15 position and are held in that position manually while the upper most louver 45 is tilted from the P16. 15 to the FIG, 16 position to extend the slotted'upper connecting bar 76' from the position illustrated in FIG. 11- to that illustrated in FIG; 12. Thereupon, the louvers are released and assume an open position substantially asillustratedin FIG. 17, being positioned by springs 94- and 130 acting thereon and tending to hold the bar 53 adjacentits lower limit, that is, near the position shown in FIG. 9. Thereupon, Whenever Wind pressure is exerted'againstthe structure, the effective force thereof will be substantially that effective upon the lower portion of the louver 45 below the stationary'u'pper louver or pane 49, as illustrated by the arrow in FIG. 18; When stronggusts ofwind arise the louvers tend to close; and'when the wind pressure reduces the louvers tend to reopen; Thespring I20, 121 is so selected that' a predetermined wind pressure must exist before'the louver 45 and latch lever 85 can-swing'against said spring'lltl, 121 to releasethe-rod latch bellcrank 89-, 91-from pin 52' on louver bar 53 and thus free the louver-s'to be swung toward closed position by spring 128, 129. As a result of this arrangement a householder may be assured against blowing of rain into a-building when theventilator is unattended with the louvers thereof-in the-op'enpositionshowninFIG. 17. Thus the'louvers'rnay be set for automatic operation in response towind' pressure'whenever-that is desired and, if wind pressure develops which commonlyaccompanies stormy conditions, or which tends to'permit entry of rain-'- through the open louvers, the louversclose'automatically' inresponseto the wind pressure and-stay closed-as long as the wind pressure continues, Since leakage is slight except at times when wind pressure exists, th'is arrange-- ment makes effective a full sealing condition of the window at all times, and at; the same time provides ventilation until I such time 1 as protectionagainst windblowm rain isrequired. 1

Further protection of a different nature is provided-by means of the unit shown in FIG. 19; The p'riniary'pur-- pose. of this unit is to make --the 4 device burglar-resistant by blocking the upper open endsof the sockets '43 to prevent removal 0f the louvers or panes' 45 in all but the closed position. Members 47 prevent removal of the louvers: from their sockets 43- when ='inclosed position A secondary purpose of: part-35 of the locking unit isto provide an attractive appearance of the --device.'-

I11 the. embodiment shown in 20, 211 yielding resilient channel-shaped binder strip145; preferably formedofi'rub'berior synthetic resin, is 'mounted upon the upper margin of each'louver 'or pane 45, Strip-1 15 has a laterally projecting flange 146 engageable with-1 the adja'cent pane' wh'enthe -panes are inclosed position as shownin FIG; 20. The strip 145'thusseals'the gaps b'etween panes or louvers-in -cold weather and also repels wind-driven rain from'flowing upwardly thereon and over the top edge thereof if the device is positioned in one or" the locked positions provided by the latch 69-73.

While the preferred embodiment of the invention has been illustratedand described, it will be understood that changes in-the construction may be made within the scope of the appended claims without departing from the spirit of the invention.

I claim:

1. A ventilator comprising a pair of opposed upright members, a plurality of louvers pivoted to said upright members andadapted to overlap in closed position, means interconnecting a group ofsaid louvers for simultaneous and equal pivotal movement, one louver being independent of said interconnecting means, link means carried by said interconnecting means, a manual latch con nected'to said linkmeans and operative to-lock said link means, interconnecting means and-= group of louvers in selected position, said manual latch havinga louver re- F leasing position, a second latch, and means responsive" to movement of the independent'louver for tripping saidsecond latch, said second latch cooperating with-said in; terconnectin-g means to releasably hold-saidinterconnect ing means andsaid-group of louvers inopenposition independently of said manual latch, said second-latch including a vertical latching leverpivoted intermediate its ends and 21 latch abutment member carried' by and projecting laterally from said lever spaced from the pivot to be bodily shiftable toward and from said interconnecting means, and an abutment on said interconnecting means engageable by said lever-mounted latch abutment memher.

2, A- ventilator comprising a pair of opposed upright members, a: plurality of louvers pivoted to said uprightmembers and adapted to overlap in closed position, meansinterconnecting a group of said louvers-for simultaneous and equal pivotal movement, one louver beingindependent of said interconnecting means, link means carriedby said interconnecting means, a manual latch connected to-said link means for locking said link means, interconnecting means and group of louvers= in" selected position and having a-louver-release position, a second latch engag-' ing said interconnecting means to n'orrnally releasabiy' hold said"interconnectingmeans andsaid group of'louvers' in open position independently of-saidmanual latch, said second latch including a vertical clever pivoted intermediate it's ends, and'alatch abutment member carried by: and projecting laterally fromf said vertical lever spaced from its pivot to be bodily shiftable toward and from said interconnecting means, an' abutment on said interconnecting means engageable'by-the latch abutment me'm-' berofsaid second latch, lost motion means "connecting said interconnecting means and the louver independent of said interconnecting means, and means responsive to movement of said independent louver for pivoting said vertical lever to'release thevlatchabutment memberof' said second latch from theabutmenton said intercon' necting means.

3. A ventilator comprising a pair of opposedupright members, aplurality Iof-louvers pivoted to said upright members and adapted to overlap in closed position, means interconnecting a group of said louvers forsimultaneous and equal pivotal movement, one louver being independent of said interconnecting means, link means carried; 7 by said interconnecting means, a manual latch connected to said link means for locking said link means, interconnecting means and group of louvers inselected position and having a louver-release position, a second latch engaging said interconnectingmeans to normally releasably' hold said interconnecting means and said group of louvers in open position independently of said manuallatch, said second latch including a vertical lever pivoted intermediate its ends, a second lever pivoted to said vertical lever spacedfrom its pivot to be bodily shiftable toward and from said interconnecting means, said second lever pivoting in alimi-ted range relative to a stop member on said vertical lever, an abutment on said interconnecting means engageable by said second lever, lost motion means connecting said interconnecting means and the louver independent of said interconnecting means, means responsive to movement of said independent louver for pivoting said verticallever to release said second latch lever from the abutment on said interconnecting means, and resilient means'normally urging said second-lever into engagement with the stop member on said vertical lever.

4. A ventilator comprising apair 'ofopposed upright members, a plurality of louvers pivoted to said upright members and adapted to overlap in closed position, means interconnecting a group of said louvers for simultaneous and equal pivotal mvement,'one louver being independent of said interconnecting means, link means carried bysaid interconnecting means, a manual latch having a variety of operative positions and a released position and connected to said link means for locking said link means, interconnecting means and group of louvers in selected position, a spring-urged second latch, said second latch including an abutment member shiftable on an upright member for engaging said interconnecting means at an abutment thereof to releasably hold said interconnecting means and said group of louvers .in open position independently of said manual latch, lost motion means connecting said interconnecting means and the independent louver, means responsive to closing movement of said independent louver for shifting said spring-urged second latch to disengage said abutment member from the abutment of said interconnecting means, said lost motion means including a'bar pivoted relative to said independent louver and means providing a pin and slot connectionbetween said bar and said interconnecting means, and means for releasably positioning said bar in predetermined relation to said interconnecting means when said manual latch is in released position.

5. A ventilator comprising a pair of opposed upright members, a plurality of louvers pivoted to said upright members and adapted to overlap in closed position, means interconnecting a group of said louvers for simultaneous and equal pivotal movement, one louver being independent of said interconnecting means, link means carried by said interconnecting means, a manual latch connected to said link means for locking said link means, interconnecting means and gnoup of louvers in selected position and having a louver-release position, a spring-urged second latch, said second latch including an abutment member shiftable on an upright member for engaging said interconnecting means at an abutment thereof to releasably hold said interconnecting means and said group of louvers in open position independently of said manual latch, llost motion means connecting said interconnecting means and the louver independent of said group, means responsive to closing movement of said independent louver for shifting said spring-urged second latch to disengage said abutment member from the abutment of said interconnecting means, said lost motion means including a bar pivoted relative to said independent louver, and means providing a pin and slot connection between said bar and said interconnecting means, a resilient latch carried by said bar and a second abutment carried by said interconnecting means and releasably engaged by said resilient latch.

6. A ventilator comprising a pair of opposed upright members, a plurality of louvers pivoted to said upright members and adapted to overlap in closed position, means interconnecting a group of said louvers for simultaneous and equal pivotal movement, one louver being independent of said interconnecting means, link means carried by said interconnecting means, a manual latch connected to said link means for locking said link means, interconnecting means and group of louvers in selected position and having a louver-release position, a spring-urged second latch, said second latch including an abutment member shiftable on an upright'member for engaging said interconnecting means at an abutment thereof to releasably hold said interconnecting means and said group of louvers in open position independently of said manual latch, lost motion means connecting said interconnecting means and the louver independent of said group, means responsive to closing movement of said independent louver for shifting said spring-urged latch to disengage said abutment member from the abutment of said interconnecting means, said lost motion means including a bar pivoted relative to said independent louver and means providing a pin and slot connection between said bar and said interconnecting means, an elongated resilient member fixedly secured at one end to said bar and including a hook portion intermediate its ends, and a second abutment on said interconnecting member releasably engaged by said hook portion, said resilient member having an elongated free end portion engageable with said second abutment through the full range of movement of said lost motion means.

7. A ventilator comprising a pair of upright members adapted to be mounted in a window frame, a plurality of horizontal louvers pivoted at their ends to said uprights and adapted to partially overlap when closed, means interconnecting a group of selected louvers for substantially simultaneous and equal pivotal movement, means automatically cooperating with said interconnecting means for releasably locking said group of louvers in open position, lost motion means connecting another of said louvers with said interconnecting means, resilient means normally positioning saidother louver in predetermined angular relation' to thelouvers of said group when the latter are held open by said locking means, means responsive to pivotal movement of said other louver toward closed position while the louvers of said group are held open by said locking means for releasing said locking means, and resilient means urging said group of louvers toward partially open position.

8. A ventilator comprising a pair of opposed upright members, a plurality of louvers pivoted to said upright members and adapted to overlap in closed position, means interconnecting a group of said louvers for simultaneous and equal pivotal movement, one louver being independent of said group, a latch assembly having an abutment member engaging said interconnecting means to releasably hold said interconnected louvers in open position, and means responsive to wind conditions acting on said independent louver for disengaging said latch abutment member from said interconnecting means whereby the exposure of the overlapping portions of the louvers to the wind tends to close said louvers.

9. A ventilator comprising a. pair 10f opposed upright members, a plurality of louvers pivoted to said upright members and adapted to overlap in closed position, means interconnecting a group of said louvers for simultaneous and equal pivotal movement, one louver being independent of said interconnecting means, link means carried by said interconnecting means, a manual latch connected to said link means and having a releasing position and a plurality of louver-locking positions, a second latch having an abutment member engaging said interconnecting means to releasably hold said interconnected gnoup of louvers in open position when said manual latch is in releasing position, lost motion means connecting said interconnecing means and the louver independent of said group of louvers and having a first adjustment, whereby said last named independent louver may be set at an angle difierent from said open position of said group of louvers as set by said second latch to respond to wind pressure and means for releasably latching said lost motion means in a second adjustment for similarly positioning all louvers.

10. A ventilator comprising a pair of opposed upright members, a plurality of louvers pivoted to said upright members and adapted to overlap in closed position, means noose-ea interconnecting a group of said louvers for simultaneous and equal pivotal movement, one louver being. independent of said interconnecting means, link means carried by said interconnecting means, a manual-latch connected to said link means for locking said interconnected louvers in selected position, said latch having a louver-releasing position, a spring-urged second latch assembly including an abutment member engaging said interconnecting means to releasably hold said interconnected louvers in open position independently of said manual latch, lost motion means connecting said interconnecting means and the louver independently of said group and having an adjustment whereby said independent louver may be set at an angle to respond to wind pressure and different from the open setting of said group of louvers by said second latch, and means responsive to closing movement of said independent louver from said last mentioned setting for shifting said spring-urged second latch to disengage said latch abutment member from said interconnecting means.

11. A ventilator comprising a pair of opposed upright members, a. plurality of louvers pivoted to said upright members and adaptedto overlap in closed position, means interconnecting a group of said louvers for simultaneous and equal pivotal movement, one louver being independent of said interconnecting means, link means carried by said interconnecting means, a manual latch connected to said link means and having a releasing position and a plurality of louver-locking positions, a second latch including an abutment member engaging said interconnecting means to releasably hold said interconnected louvers in open position when said manual latch is in re leasing position, wind responsive means for tripping said second latch to disengage said latch abutment member from said interconnecting means, whereby the louvers are 12 free to close in response to wind pressure, and spring means normally urging said louvers toward partially open position.

12. A ventilator comprising a pair of opposed upright members adapted to be mounted in a window frame, a plurality of pairs of spaced registering sockets, one socket of each pair being pivoted to each upright member, a plurality of panels each supported at opposite ends by a pair of said registering sockets and adapted for overlapping relation in closed position, a lever carried by each socket, a bar pivoted to and interconnecting a group of adjacent levers, -a manual latch means connected to said bar andhaving a release position and a plurality of panellocking positions, a second bar pivoted to a lever which is independent of said group of levers, said second bar having'a lost motion connection with said first bar, releasable means for normally positioning said oars in predetermined relation, means pivoted to an upright member and mounting an abutment member for engaging and cooperating with said .first bar for releasably locating the first bar and thusthe sockets associated therewith in open position, resilient means normally urging said sockets toward partially open position, and means responsive to movement of said second bar by reasonof wind pressure on the panel carried-by said independent socket for tripping said releasable means to disengage said abutment member from said first bar.

References Qited in the fileof this patent UNITED STATES PATENTS Voysey Apr. 14, 1942 

